Ancam was an Age written by Atrus.

There is an island where all organic and inorganic objects react to sunlight or changes in temperature.

Thin trees with soft trunks at night bend to lie across the landscape and hills, resembling serpents under the moon. In the morning, the whole forest begins to rise up as trunks twist and lift their branches and broad leaves toward the rising light. The trees are pale blue but as they warm, their color changes; green spreads, and towards the noon, yellow-orange.

Although Atrus expected what the Age contained, he was excited when he witnessed them.[1]